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Physics of transcription regulation by the assembly of transcriptional condensate and the transcription of enhancer sequence

Research Project

Project/Area Number 21K03479
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13040:Biophysics, chemical physics and soft matter physics-related
Research InstitutionHokkaido University

Principal Investigator

Yamamoto Tetsuya  北海道大学, 化学反応創成研究拠点, 特任准教授 (40610027)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsヘテロクロマチン / リピート配列 / RNA干渉経路 / 転写 / 高分子の表面吸着 / 転写制御 / 転写凝集体 / エンハンサ / 転写ダイナミクス / 新生RNA / 核小体 / eRNA / RNA合成酵素
Outline of Research at the Start

遺伝子は、転写活性化因子とRNAの凝集体(転写凝集体)によって活性化される。スーパーエンハンサと呼ばれるDNA領域は、遺伝子を凝集体にアンカリングすることによって遺伝子を活性化することが実験的に示唆されている。本研究課題では、エンハンサが生成するRNAとRNA合成酵素の鎖状部位が転写凝集体の形成の鍵となるという最近の実験結果を参考にして、申請者がこれまで構築してきた転写によるRNAの生成が誘起する相分離の理論を拡張することによって、①スーパーエンハンサが転写凝集体を形成する物理的機構と、②転写凝集体の形成・消滅ダイナミクスと転写活性化機構を明らかにする。

Outline of Final Research Achievements

Heterochromatin in fission yeasts is assembled by RNAi pathway. Recent experiments have shown that tandemly repeated genes are favorable substrates for RNAi-mediated heterochromatin (repeat induced RNAi). The connectivity of these repeated genes implies that polymer physics is useful to understand the repeat induced RNAi. In this research, we have taken into account the essence of the surface adhesion of polymers in an extension of the kinetic equations of RNAi pathway to predict the mechanism of repeat induced RNAi. We have shown that not only the number of genes in the tandem repeat, but also the length of each gene are critical factors that determine the assembly of heterochromatin. This research has revealed one of the biophysical functions of repeated genes.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、①リピート配列の生物物理学的意義と②相分離以外のヘテロクロマチン形成機構を明らかにした点で重要である。RNA干渉経路のようなシステム生物学的アプローチが適当な系に、遺伝子の連結性という構造的要素を加えて融合した点も新しい。本研究成果は、pRNA経路などの小分子RNAの生成によってヘテロクロマチンが形成される系だけでなく、リボソームDNA、ヒストン遺伝子、スーパーエンハンサなどのリピート配列(または、同じ機能配列が連結した領域)と核内構造体との相互作用を明らかにする研究に拡張することができる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (22 results)

All 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Open Access: 6 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 4 results) Remarks (2 results)

  • [Int'l Joint Research] TU Dresden(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] TU Dresden(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Polymer brush inspired by ribosomal RNA transcription2023

    • Author(s)
      Tetsuya Yamamoto and Wei Li
    • Journal Title

      European Physical Journal E

      Volume: 46 Issue: 7 Pages: 61-61

    • DOI

      10.1140/epje/s10189-023-00323-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Polymeric nature of tandemly repeated genes enhances assembly of constitutive heterochromatin in fission yeast2023

    • Author(s)
      Tetsuya Yamamoto, Takahiro Asanuma, and Yota Murakami
    • Journal Title

      Communications Biology

      Volume: 6 Issue: 1 Pages: 796-796

    • DOI

      10.1038/s42003-023-05154-w

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elasticity control of entangled chromosomes: Crosstalk between condensin complexes and nucleosomes2023

    • Author(s)
      Yamamoto Tetsuya、Kinoshita Kazuhisa、Hirano Tatsuya
    • Journal Title

      Biophysical Journal

      Volume: 122 Issue: 19 Pages: 3869-3881

    • DOI

      10.1016/j.bpj.2023.08.006

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Nascent ribosomal RNA act as surfactant that suppresses growth of fibrillar centers in nucleolus2023

    • Author(s)
      Yamamoto Tetsuya、Yamazaki Tomohiro、Ninomiya Kensuke、Hirose Tetsuro
    • Journal Title

      Communications Biology

      Volume: 6 Issue: 1 Pages: 1129-1129

    • DOI

      10.1038/s42003-023-05519-1

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Loop extrusion driven volume phase transition of entangled chromosomes2022

    • Author(s)
      Tetsuya Yamamoto and Helmut Schiessel
    • Journal Title

      Biophysical Journal

      Volume: 121 Issue: 14 Pages: 2742-2750

    • DOI

      10.1016/j.bpj.2022.06.014

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Statistical Thermodynamics Approach for Intracellular Phase Separation2022

    • Author(s)
      Tomohiro Yamazaki
    • Journal Title

      Methods Mol. Biol.

      Volume: 2509 Pages: 361-393

    • DOI

      10.1007/978-1-0716-2380-0_22

    • ISBN
      9781071623794, 9781071623800
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Triblock copolymer micelle model of spherical paraspeckles2022

    • Author(s)
      Tetsuya Yamamoto, Tomohiro Yamazaki, and Tetsuro Hirose
    • Journal Title

      Front. Mol. Biosci.

      Volume: 9 Pages: 925058-925058

    • DOI

      10.3389/fmolb.2022.925058

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Micellization: A new principle in the formation of biomolecular condensates2022

    • Author(s)
      Tomohiro Yamazaki, Tetsuya Yamamoto, and Tetsuro Hirose
    • Journal Title

      Front. Mol. Biosci.

      Volume: 9 Pages: 974772-974772

    • DOI

      10.3389/fmolb.2022.974772

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Nascent ribosomal RNA acts as surfactant that suppresses growth of fibrillar centers in nucleolus2021

    • Author(s)
      Tetsuya Yamamoto, Tomohiro Yamazaki, Kensuke Ninomiya, and Tetsuro Hirose
    • Journal Title

      bioRxiv

      Volume: 459702 Pages: 1-12

    • DOI

      10.1101/2021.09.09.459702

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Presentation] Physics gene regulation2022

    • Author(s)
      Tetsuya Yamamoto
    • Organizer
      ゲノムモデリング研究会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Physics of structural formation of entangled chromosomes2022

    • Author(s)
      Tetsuya Yamamoto
    • Organizer
      第74回細胞生物学会年会シンポジウム
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] Essence of assembly of constitutive heterochromain in fission yeast lies in surface adhesion of polymers?2022

    • Author(s)
      Tetsuya Yamamoto, Takahiro Asanuma, and Yota Murakami
    • Organizer
      第60回日本生物物理学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Essence of assembly of constitutive heterochromain in fission yeast lies in surface adhesion of polymers?2022

    • Author(s)
      Tetsuya Yamamoto, Takahiro Asanuma, and Yota Murakami
    • Organizer
      第45回日本分子生物学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] ヌクレオソームとコンデンシンのクロストークを介した絡み合った染色体の弾性制御2022

    • Author(s)
      Tetsuya Yamamoto, Kazuhisa Kinoshita, and Tatsuya Hirano
    • Organizer
      第40回染色体ワークショップ・第21回核ダイナミクス研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] Regulation of nuclear bodies by transcription2022

    • Author(s)
      Tetsuya Yamamoto
    • Organizer
      The 30th Hot Spring Harbor Symposium
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 転写凝集体に局在化しているスーパーエンハンサの転写制御機構2021

    • Author(s)
      山本哲也
    • Organizer
      生物物理学会ゲノム生物物理学サブグループキックオフミーティング
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Roles of loop extrusion process in transcription dynamics of target genes of superenhancers2021

    • Author(s)
      Tetsuya Yamamoto, Takahiro Sakaue, and Helmut Schiessel
    • Organizer
      第59回日本生物物理学会年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Transcription dynamics of target genes of superenhancers2021

    • Author(s)
      Tetsuya Yamamoto, Takahiro Sakaue, and Helmut Schiessel
    • Organizer
      第44回日本分子生物学会
    • Related Report
      2021 Research-status Report
  • [Remarks] 繰り返し配列の「つながり」がヘテロクロマチン形成を誘導

    • URL

      https://www.hokudai.ac.jp/news/2023/08/post-1276.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 生成中のRNAは核小体の内部構造を制御する「界面活性剤」として働く

    • URL

      https://www.hokudai.ac.jp/news/2023/11/rna-1.html

    • Related Report
      2023 Annual Research Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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